Saving Minnesota's polluted lakes takes science, political will

Dan Livdahl tests Okabena's clarity
Watershed manager Dan Livdahl drops a disc into Okabena Lake to test the water's clarity. "Human nature is always to see our activities as OK or relatively benign and to point the finger at somebody else," he said. "The fact is, everybody within the watershed has an effect. All of our actions add, right here."